Thermodynamic Properties of (Ca,Sr)$_2$RuO$_4$ in Magnetic Fields

J. Baier; T. Zabel; M. Kriener; P. Steffens; O. Schumann; O. Friedt; A. Freimuth; A. Revcolevschi; S. Nakatsuji; Y. Maeno; T. Lorenz; M. Braden

doi:10.1016/j.physb.2006.01.215

paper

Thermodynamic Properties of (Ca,Sr) $_{2}$ RuO $_{4}$ in Magnetic Fields

arXiv:cond-mat/0511220 · doi:10.1016/j.physb.2006.01.215

Abstract

We have studied the influence of a magnetic field on the thermodynamic properties of Ca $_{2 - x}$ Sr $_{x}$ RuO $_{4}$ in the intermediate metallic region with tilt and rotational distortions ( $0.2 \leq x \leq 0.5$ ). We find strong and anisotropic thermal expansion anomalies at low temperatures, which are suppressed and even reversed by a magnetic field. The metamagnetic transition of Ca $_{1.8}$ Sr $_{0.2}$ RuO $_{4}$ is accompanied by a large magnetostriction. Furthermore, we observe a strong magnetic-field dependence of $c_{p} / T$ , that can be explained by magnetic fluctuations.

2 pages, 3 figures, to appear in Physica B (Proceedings of SCES'05)

Thermodynamic Properties of (Ca,Sr)2​RuO4​ in Magnetic Fields

Abstract

Thermodynamic Properties of (Ca,Sr) $_{2}$ RuO $_{4}$ in Magnetic Fields